в 16:40, 26 мая 2010

2010-05-26T16:40:30Z

Admin: 1 версия

2010-05-26T12:56:45Z

1 версия

Новая страница

==Add and remove tree nodes==

<source lang="vbnet">Imports System.Windows.Forms
public class TreeViewAddDeleteItem
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
Private components As System.ruponentModel.IContainer
Friend WithEvents TreeView1 As System.Windows.Forms.TreeView
Friend WithEvents Button1 As System.Windows.Forms.Button
Friend WithEvents Button2 As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.TreeView1 = New System.Windows.Forms.TreeView
Me.Button1 = New System.Windows.Forms.Button
Me.Button2 = New System.Windows.Forms.Button
Me.SuspendLayout()
"
"TreeView1
"
Me.TreeView1.ImageIndex = -1
Me.TreeView1.Location = New System.Drawing.Point(48, 16)
Me.TreeView1.Name = "TreeView1"
Me.TreeView1.Nodes.AddRange(New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("a", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("Visual Basic"), New System.Windows.Forms.TreeNode("Visual C++"), New System.Windows.Forms.TreeNode("Delphi"), New System.Windows.Forms.TreeNode("Java")}), New System.Windows.Forms.TreeNode("B", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("B1"), New System.Windows.Forms.TreeNode("B2"), New System.Windows.Forms.TreeNode("B3"), New System.Windows.Forms.TreeNode("B4")})})
Me.TreeView1.SelectedImageIndex = -1
Me.TreeView1.Size = New System.Drawing.Size(200, 168)
Me.TreeView1.TabIndex = 0
"
"Button1
"
Me.Button1.Location = New System.Drawing.Point(48, 200)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(80, 24)
Me.Button1.TabIndex = 1
Me.Button1.Text = "Add"
"
"Button2
"
Me.Button2.Location = New System.Drawing.Point(176, 200)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(80, 24)
Me.Button2.TabIndex = 2
Me.Button2.Text = "Delete"
"
"Form1
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 238)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.TreeView1)
Me.ResumeLayout(False)
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim str As New TreeNode
TreeView1.SelectedNode.Nodes.Add("New")
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
TreeView1.Nodes.Remove(TreeView1.SelectedNode)
End Sub
End Class</source>

==Build file tree recursively==

<source lang="vbnet">Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class BuildFileTree
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Private Sub ActTraverse_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles ActTraverse.Click
If (My.ruputer.FileSystem.DirectoryExists(StartPath.Text) = False) Then
Exit Sub
End If
PathTree.Nodes.Clear()
BuildDirectoryTree(Nothing, StartPath.Text)
End Sub
Private Sub BuildDirectoryTree(ByVal fromNode As TreeNode,ByVal basePath As String)
Dim newDirectory As TreeNode
Dim justTheSubdirectory As String
For Each oneDirectory As String In My.ruputer.FileSystem.GetDirectories(basePath)
justTheSubdirectory = My.ruputer.FileSystem.GetName(oneDirectory)
If (fromNode Is Nothing) Then
newDirectory = PathTree.Nodes.Add( justTheSubdirectory)
Else
newDirectory = fromNode.Nodes.Add(justTheSubdirectory)
End If
BuildDirectoryTree(newDirectory, My.ruputer.FileSystem.rubinePath(basePath, justTheSubdirectory))
Next oneDirectory
End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
Inherits System.Windows.Forms.Form
"Form overrides dispose to clean up the component list.
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing AndAlso components IsNot Nothing Then
components.Dispose()
End If
MyBase.Dispose(disposing)
End Sub
"Required by the Windows Form Designer
Private components As System.ruponentModel.IContainer
"NOTE: The following procedure is required by the Windows Form Designer
"It can be modified using the Windows Form Designer.
"Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> _
Private Sub InitializeComponent()
Me.ActTraverse = New System.Windows.Forms.Button
Me.StartPath = New System.Windows.Forms.TextBox
Me.PathTree = New System.Windows.Forms.TreeView
Me.Label1 = New System.Windows.Forms.Label
Me.Label2 = New System.Windows.Forms.Label
Me.SuspendLayout()
"
"ActTraverse
"
Me.ActTraverse.Location = New System.Drawing.Point(326, 32)
Me.ActTraverse.Name = "ActTraverse"
Me.ActTraverse.Size = New System.Drawing.Size(75, 23)
Me.ActTraverse.TabIndex = 2
Me.ActTraverse.Text = "Traverse"
Me.ActTraverse.UseVisualStyleBackColor = True
"
"StartPath
"
Me.StartPath.Location = New System.Drawing.Point(72, 8)
Me.StartPath.Name = "StartPath"
Me.StartPath.Size = New System.Drawing.Size(328, 20)
Me.StartPath.TabIndex = 1
"
"PathTree
"
Me.PathTree.Location = New System.Drawing.Point(72, 64)
Me.PathTree.Name = "PathTree"
Me.PathTree.Size = New System.Drawing.Size(329, 184)
Me.PathTree.TabIndex = 4
"
"Label1
"
Me.Label1.AutoSize = True
Me.Label1.Location = New System.Drawing.Point(8, 10)
Me.Label1.Name = "Label1"
Me.Label1.Size = New System.Drawing.Size(57, 13)
Me.Label1.TabIndex = 0
Me.Label1.Text = "Start Path:"
"
"Label2
"
Me.Label2.AutoSize = True
Me.Label2.Location = New System.Drawing.Point(8, 66)
Me.Label2.Name = "Label2"
Me.Label2.Size = New System.Drawing.Size(57, 13)
Me.Label2.TabIndex = 3
Me.Label2.Text = "Path Tree:"
"
"Form1
"
Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
Me.ClientSize = New System.Drawing.Size(411, 260)
Me.Controls.Add(Me.Label2)
Me.Controls.Add(Me.Label1)
Me.Controls.Add(Me.PathTree)
Me.Controls.Add(Me.StartPath)
Me.Controls.Add(Me.ActTraverse)
Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
Me.MaximizeBox = False
Me.Name = "Form1"
Me.Text = "Directory Traversal"
Me.ResumeLayout(False)
Me.PerformLayout()
End Sub
Friend WithEvents ActTraverse As System.Windows.Forms.Button
Friend WithEvents StartPath As System.Windows.Forms.TextBox
Friend WithEvents PathTree As System.Windows.Forms.TreeView
Friend WithEvents Label1 As System.Windows.Forms.Label
Friend WithEvents Label2 As System.Windows.Forms.Label
End Class</source>

==Creating Tree Views in Code==

<source lang="vbnet">Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class TreeViewCreationInCode
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
Dim TreeView1 As TreeView
Public Sub New()
MyBase.New()
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 293)
TreeView1 = New TreeView
TreeView1.Location = New Point(75, 100)
TreeView1.Size = New Size(150, 150)
Controls.Add(TreeView1)
TreeView1.Nodes.Clear()
Dim RootNode = New TreeNode("Root")
TreeView1.Nodes.Add(RootNode)
TreeView1.Nodes(0).Nodes.Add(New TreeNode("Node 1"))
For intLoopIndex As Integer = 2 To 3
TreeView1.Nodes(0).Nodes(0).Nodes.Add(New _
TreeNode("Node" & Str(intLoopIndex)))
Next intLoopIndex
TreeView1.Nodes(0).Nodes.Add(New TreeNode("Node 4"))
For intLoopIndex As Integer = 5 To 6
TreeView1.Nodes(0).Nodes(1).Nodes.Add(New _
TreeNode("Node" & Str(intLoopIndex)))
Next intLoopIndex
End Sub
End Class</source>

==Tree Node selection event==

<source lang="vbnet">Imports System.Windows.Forms
public class SplitterControl
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
Private components As System.ruponentModel.IContainer
Friend WithEvents Splitter1 As System.Windows.Forms.Splitter
Friend WithEvents TreeView1 As System.Windows.Forms.TreeView
Friend WithEvents ImageList1 As System.Windows.Forms.ImageList
Friend WithEvents Splitter2 As System.Windows.Forms.Splitter
Friend WithEvents Panel1 As System.Windows.Forms.Panel
Friend WithEvents Label1 As System.Windows.Forms.Label
Friend WithEvents Splitter3 As System.Windows.Forms.Splitter
Friend WithEvents ListView1 As System.Windows.Forms.ListView
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.ruponents = New System.ruponentModel.Container
Me.Splitter1 = New System.Windows.Forms.Splitter
Me.TreeView1 = New System.Windows.Forms.TreeView
Me.ImageList1 = New System.Windows.Forms.ImageList(Me.ruponents)
Me.Splitter2 = New System.Windows.Forms.Splitter
Me.Panel1 = New System.Windows.Forms.Panel
Me.Label1 = New System.Windows.Forms.Label
Me.Splitter3 = New System.Windows.Forms.Splitter
Me.ListView1 = New System.Windows.Forms.ListView
Me.Panel1.SuspendLayout()
Me.SuspendLayout()
"
"Splitter1
"
Me.Splitter1.Location = New System.Drawing.Point(0, 0)
Me.Splitter1.Name = "Splitter1"
Me.Splitter1.Size = New System.Drawing.Size(3, 266)
Me.Splitter1.TabIndex = 0
Me.Splitter1.TabStop = False
"
"TreeView1
"
Me.TreeView1.Dock = System.Windows.Forms.DockStyle.Left
Me.TreeView1.Location = New System.Drawing.Point(3, 0)
Me.TreeView1.Name = "TreeView1"
Me.TreeView1.Nodes.AddRange(New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("A", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("Visual Basic"), New System.Windows.Forms.TreeNode("Visual C++"), New System.Windows.Forms.TreeNode("Delphi"), New System.Windows.Forms.TreeNode("Java")}), New System.Windows.Forms.TreeNode("B", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("1"), New System.Windows.Forms.TreeNode("2"), New System.Windows.Forms.TreeNode("3"), New System.Windows.Forms.TreeNode("4")})})
Me.TreeView1.Size = New System.Drawing.Size(101, 266)
Me.TreeView1.TabIndex = 1
"
"Splitter2
"
Me.Splitter2.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.Splitter2.Location = New System.Drawing.Point(104, 0)
Me.Splitter2.Name = "Splitter2"
Me.Splitter2.Size = New System.Drawing.Size(8, 266)
Me.Splitter2.TabIndex = 2
Me.Splitter2.TabStop = False
"
"Panel1
"
Me.Panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.Panel1.Controls.Add(Me.ListView1)
Me.Panel1.Controls.Add(Me.Splitter3)
Me.Panel1.Controls.Add(Me.Label1)
Me.Panel1.Dock = System.Windows.Forms.DockStyle.Top
Me.Panel1.Location = New System.Drawing.Point(112, 0)
Me.Panel1.Name = "Panel1"
Me.Panel1.Size = New System.Drawing.Size(248, 264)
Me.Panel1.TabIndex = 3
"
"Label1
"
Me.Label1.Dock = System.Windows.Forms.DockStyle.Top
Me.Label1.Location = New System.Drawing.Point(0, 0)
Me.Label1.Name = "Label1"
Me.Label1.Size = New System.Drawing.Size(244, 32)
Me.Label1.TabIndex = 0
Me.Label1.Text = "Label1"
"
"Splitter3
"
Me.Splitter3.Dock = System.Windows.Forms.DockStyle.Top
Me.Splitter3.Location = New System.Drawing.Point(0, 32)
Me.Splitter3.Name = "Splitter3"
Me.Splitter3.Size = New System.Drawing.Size(244, 8)
Me.Splitter3.TabIndex = 1
Me.Splitter3.TabStop = False
"
"ListView1
"
Me.ListView1.Dock = System.Windows.Forms.DockStyle.Fill
Me.ListView1.Location = New System.Drawing.Point(0, 40)
Me.ListView1.Name = "ListView1"
Me.ListView1.Size = New System.Drawing.Size(244, 220)
Me.ListView1.TabIndex = 2
"
"Form1
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(360, 266)
Me.Controls.Add(Me.Panel1)
Me.Controls.Add(Me.Splitter2)
Me.Controls.Add(Me.TreeView1)
Me.Controls.Add(Me.Splitter1)
Me.Panel1.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles TreeView1.AfterSelect
Dim childnum, index, i As Int32
childnum = TreeView1.SelectedNode.GetNodeCount(False)
index = TreeView1.SelectedNode.Index
index = index + 1
ListView1.Items.Clear()
For i = 0 To childnum - 1
ListView1.Items.Add(index.ToString + "." + i.ToString, 1)
Next
Label1.Text = TreeView1.SelectedNode.FullPath
End Sub
End Class</source>

==TreeView CheckBox==

<source lang="vbnet">Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class TreeViewSelectionCheckBoxes
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
"This call is required by the Windows Form Designer.
InitializeComponent()
"Add any initialization after the InitializeComponent() call
End Sub
"Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
"Required by the Windows Form Designer
Private components As System.ruponentModel.IContainer
"NOTE: The following procedure is required by the Windows Form Designer
"It can be modified using the Windows Form Designer.
"Do not modify it using the code editor.
Friend WithEvents TreeView1 As System.Windows.Forms.TreeView
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
Friend WithEvents Button1 As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.TreeView1 = New System.Windows.Forms.TreeView
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.Button1 = New System.Windows.Forms.Button
Me.SuspendLayout()
"
"TreeView1
"
Me.TreeView1.ImageIndex = -1
Me.TreeView1.Location = New System.Drawing.Point(88, 64)
Me.TreeView1.Name = "TreeView1"
Me.TreeView1.Nodes.AddRange(New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("Root", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("Node 1", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("Node 2"), New System.Windows.Forms.TreeNode("Node 3")}), New System.Windows.Forms.TreeNode("Node 4", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("Node 5"), New System.Windows.Forms.TreeNode("Node 6")})})})
Me.TreeView1.SelectedImageIndex = -1
Me.TreeView1.Size = New System.Drawing.Size(121, 120)
Me.TreeView1.TabIndex = 0
"
"TextBox1
"
Me.TextBox1.Location = New System.Drawing.Point(88, 200)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.Size = New System.Drawing.Size(120, 20)
Me.TextBox1.TabIndex = 1
Me.TextBox1.Text = ""
"
"Button1
"
Me.Button1.Location = New System.Drawing.Point(88, 232)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(120, 23)
Me.Button1.TabIndex = 3
Me.Button1.Text = "Show Check Boxes"
"
"Form1
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.TreeView1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles TreeView1.AfterSelect
TextBox1.Text = e.Node.Text & " was selected."
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TreeView1.CheckBoxes = True
End Sub
Private Sub TreeView1_AfterCheck(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles TreeView1.AfterCheck
If e.Node.Checked Then
TextBox1.Text = e.Node.Text & " is checked."
Else
TextBox1.Text = e.Node.Text & " is not checked."
End If
End Sub
End Class</source>

==Using a TreeView to display the directory structure==

<source lang="vbnet">Imports System.IO
Imports System.Windows.Forms
public class FileTreeView
public Shared Sub Main
Application.Run(New FrmTreeViewDirectory)
End Sub
End class

Public Class FrmTreeViewDirectory
Inherits Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
"This call is required by the Windows Form Designer.
InitializeComponent()
"Add any initialization after the InitializeComponent()
"call
End Sub
"Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If Disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(Disposing)
End Sub
" contains view of c: drive directory structure
Friend WithEvents treDirectory As System.Windows.Forms.TreeView
"Required by the Windows Form Designer
Private components As System.ruponentModel.Container
"NOTE: The following procedure is required by the Windows Form Designer
"It can be modified using the Windows Form Designer.
"Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.treDirectory = New System.Windows.Forms.TreeView()
Me.SuspendLayout()
"
"treDirectory
"
Me.treDirectory.Dock = System.Windows.Forms.DockStyle.Fill
Me.treDirectory.ImageIndex = -1
Me.treDirectory.Name = "treDirectory"
Me.treDirectory.SelectedImageIndex = -1
Me.treDirectory.Size = New System.Drawing.Size(296, 293)
Me.treDirectory.TabIndex = 0
"
"FrmTreeViewDirectory
"
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(296, 293)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.treDirectory})
Me.Name = "FrmTreeViewDirectory"
Me.Text = "TreeViewDirectoryStructure"
Me.ResumeLayout(False)
End Sub
#End Region
Public Sub PopulateTreeView(ByVal directoryValue As String, _
ByVal parentNode As TreeNode)
Dim directoryArray As String() = Directory.GetDirectories(directoryValue)
If directoryArray.Length <> 0 Then
Dim currentDirectory As String
For Each currentDirectory In directoryArray
Dim myNode As TreeNode = New TreeNode(currentDirectory)
parentNode.Nodes.Add(myNode)
" PopulateTreeView(currentDirectory, myNode)
Next
End If
End Sub
Private Sub FrmTreeViewDirectory_Load(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
treDirectory.Nodes.Add("C:")
PopulateTreeView("C:\", treDirectory.Nodes(0))
End Sub
End Class</source>

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VB.Net Tutorial/GUI/TreeView - История изменений

в 16:40, 26 мая 2010

Admin: 1 версия